Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * ROHM 1780GLI Ambient Light Sensor Driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (C) 2016 Linaro Ltd.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Author: Linus Walleij <linus.walleij@linaro.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * Loosely based on the previous BH1780 ALS misc driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * Copyright (C) 2010 Texas Instruments
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * Author: Hemanth V <hemanthv@ti.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/mod_devicetable.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/pm_runtime.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/iio/iio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include <linux/iio/sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <linux/bitops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #define BH1780_CMD_BIT		BIT(7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #define BH1780_REG_CONTROL	0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #define BH1780_REG_PARTID	0x0A
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define BH1780_REG_MANFID	0x0B
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #define BH1780_REG_DLOW		0x0C
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #define BH1780_REG_DHIGH	0x0D
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #define BH1780_REVMASK		GENMASK(3,0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #define BH1780_POWMASK		GENMASK(1,0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #define BH1780_POFF		(0x0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #define BH1780_PON		(0x3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) /* power on settling time in ms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #define BH1780_PON_DELAY	2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) /* max time before value available in ms */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #define BH1780_INTERVAL		250
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) struct bh1780_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) static int bh1780_write(struct bh1780_data *bh1780, u8 reg, u8 val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	int ret = i2c_smbus_write_byte_data(bh1780->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 					    BH1780_CMD_BIT | reg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 					    val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		dev_err(&bh1780->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 			"i2c_smbus_write_byte_data failed error "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 			"%d, register %01x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 			ret, reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) static int bh1780_read(struct bh1780_data *bh1780, u8 reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	int ret = i2c_smbus_read_byte_data(bh1780->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 					   BH1780_CMD_BIT | reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		dev_err(&bh1780->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 			"i2c_smbus_read_byte_data failed error "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 			"%d, register %01x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 			ret, reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) static int bh1780_read_word(struct bh1780_data *bh1780, u8 reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	int ret = i2c_smbus_read_word_data(bh1780->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 					   BH1780_CMD_BIT | reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 		dev_err(&bh1780->client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 			"i2c_smbus_read_word_data failed error "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 			"%d, register %01x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 			ret, reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) static int bh1780_debugfs_reg_access(struct iio_dev *indio_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 			      unsigned int reg, unsigned int writeval,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 			      unsigned int *readval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	struct bh1780_data *bh1780 = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	if (!readval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 		return bh1780_write(bh1780, (u8)reg, (u8)writeval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	ret = bh1780_read(bh1780, (u8)reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	*readval = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) static int bh1780_read_raw(struct iio_dev *indio_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 			   struct iio_chan_spec const *chan,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 			   int *val, int *val2, long mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	struct bh1780_data *bh1780 = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	int value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	switch (mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	case IIO_CHAN_INFO_RAW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		switch (chan->type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 		case IIO_LIGHT:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 			pm_runtime_get_sync(&bh1780->client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 			value = bh1780_read_word(bh1780, BH1780_REG_DLOW);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 			if (value < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 				return value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 			pm_runtime_mark_last_busy(&bh1780->client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 			pm_runtime_put_autosuspend(&bh1780->client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 			*val = value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 			return IIO_VAL_INT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	case IIO_CHAN_INFO_INT_TIME:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		*val = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 		*val2 = BH1780_INTERVAL * 1000;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		return IIO_VAL_INT_PLUS_MICRO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) static const struct iio_info bh1780_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	.read_raw = bh1780_read_raw,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	.debugfs_reg_access = bh1780_debugfs_reg_access,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) static const struct iio_chan_spec bh1780_channels[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		.type = IIO_LIGHT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 				      BIT(IIO_CHAN_INFO_INT_TIME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) static int bh1780_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 			const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	struct bh1780_data *bh1780;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	struct i2c_adapter *adapter = client->adapter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	struct iio_dev *indio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 		return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*bh1780));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	if (!indio_dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	bh1780 = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	bh1780->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	i2c_set_clientdata(client, indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	/* Power up the device */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	ret = bh1780_write(bh1780, BH1780_REG_CONTROL, BH1780_PON);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	msleep(BH1780_PON_DELAY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	pm_runtime_get_noresume(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	pm_runtime_set_active(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	pm_runtime_enable(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	ret = bh1780_read(bh1780, BH1780_REG_PARTID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		goto out_disable_pm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	dev_info(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		 "Ambient Light Sensor, Rev : %lu\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		 (ret & BH1780_REVMASK));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	 * As the device takes 250 ms to even come up with a fresh
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	 * measurement after power-on, do not shut it down unnecessarily.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	 * Set autosuspend to a five seconds.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	pm_runtime_set_autosuspend_delay(&client->dev, 5000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	pm_runtime_use_autosuspend(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	pm_runtime_put(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	indio_dev->info = &bh1780_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	indio_dev->name = "bh1780";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	indio_dev->channels = bh1780_channels;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	indio_dev->num_channels = ARRAY_SIZE(bh1780_channels);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	indio_dev->modes = INDIO_DIRECT_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	ret = iio_device_register(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 		goto out_disable_pm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) out_disable_pm:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	pm_runtime_put_noidle(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 	pm_runtime_disable(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) static int bh1780_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	struct iio_dev *indio_dev = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	struct bh1780_data *bh1780 = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	iio_device_unregister(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	pm_runtime_get_sync(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	pm_runtime_put_noidle(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	pm_runtime_disable(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	ret = bh1780_write(bh1780, BH1780_REG_CONTROL, BH1780_POFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 		dev_err(&client->dev, "failed to power off\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) #ifdef CONFIG_PM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) static int bh1780_runtime_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	struct i2c_client *client = to_i2c_client(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	struct iio_dev *indio_dev = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	struct bh1780_data *bh1780 = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	ret = bh1780_write(bh1780, BH1780_REG_CONTROL, BH1780_POFF);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 		dev_err(dev, "failed to runtime suspend\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) static int bh1780_runtime_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	struct i2c_client *client = to_i2c_client(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	struct iio_dev *indio_dev = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	struct bh1780_data *bh1780 = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	ret = bh1780_write(bh1780, BH1780_REG_CONTROL, BH1780_PON);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 		dev_err(dev, "failed to runtime resume\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	/* Wait for power on, then for a value to be available */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	msleep(BH1780_PON_DELAY + BH1780_INTERVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) #endif /* CONFIG_PM */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) static const struct dev_pm_ops bh1780_dev_pm_ops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 				pm_runtime_force_resume)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	SET_RUNTIME_PM_OPS(bh1780_runtime_suspend,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 			   bh1780_runtime_resume, NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) static const struct i2c_device_id bh1780_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	{ "bh1780", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	{ },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) MODULE_DEVICE_TABLE(i2c, bh1780_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) static const struct of_device_id of_bh1780_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	{ .compatible = "rohm,bh1780gli", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	{},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) MODULE_DEVICE_TABLE(of, of_bh1780_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) static struct i2c_driver bh1780_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	.probe		= bh1780_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	.remove		= bh1780_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	.id_table	= bh1780_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 		.name = "bh1780",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 		.pm = &bh1780_dev_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 		.of_match_table = of_bh1780_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) module_i2c_driver(bh1780_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) MODULE_DESCRIPTION("ROHM BH1780GLI Ambient Light Sensor Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) MODULE_AUTHOR("Linus Walleij <linus.walleij@linaro.org>");